Design of in-plane torsion experiment to characterize anisotropic plasticity and fracture under simple shear

A novel experimental set-up is proposed to perform in-plane torsion experiments on grooved disk specimens. As compared previously systems, an enhanced clamping system introduced enable the testing of high strength materials such as dual phase steels. The achieved without applying pressure through axial actuator. Instead a custom-made washer-nut used which allows for monitoring entire specimen front surface with cameras. Experiments are performed three different steels (DC01, DP980, AISI301) demonstrate validity technique measuring stress–strain curve strains up 2, strain rate jump testing, cyclic loading and fracture testing. In particular, demonstration elucidate importance full field measurements during torsion. fields vary along gage section circumference in periodic manner that related anisotropy tested material. This important observation confirmed finite element study covering wide range anisotropic Hill’48 non-associated plastic flow.